site/pages/topic/_id.vue

            <span v-if="likeUsers.length" class="like-desc"
              >有{{ topic.likeCount }}人点赞</span
            >

出错信息：
ERROR [Vue warn]: Error in render: "TypeError: Cannot read property 'length' of null" 12:36:31

found in

---> <Pages/topic/Id.vue> at pages/topic/_id.vue

<Layouts/default.vue> at layouts/default.vue

官网里，但凡没有点赞的主题，都提示500错误。例如： https://mlog.club/topic/1556